Retrofitting can also allow for a green technology roofing system to be added to the existing roof system. As business owners are transitioning to LEED Certified (Leadership in Energy & Environmental Design) designs, many business owners find their margins when selling or renting these commercial buildings increase in revenue because of the high value of the LEED Certified design.
Urbanland reported in 2011 how a bank in Frankfurt, Deutsche Bank, completed a retrofit. Upon completion, the bank found they had been able to cut its energy supply in half and water supply by almost seventy five percent! If that isn't enough to be excited about, those who have commercial retrofit completed on their buildings are able to demand a higher rent or sale price for their properties because of the perceived and actual value of a retrofit roof.